RT Book, Section A1 Saw, Jacqueline A1 Chandrasekhar, Jaya A1 Zaman, Sarah A1 Reynolds, Harmony A2 Fuster, Valentin A2 Narula, Jagat A2 Vaishnava, Prashant A2 Leon, Martin B. A2 Callans, David J. A2 Rumsfeld, John S. A2 Poppas, Athena SR Print(0) ID 1202444104 T1 Mimickers of Atherosclerotic Myocardial Infarction: SCAD, Coronary Vasospasm, Myocarditis, and Takotsubo Syndrome T2 Fuster and Hurst's The Heart, 15e YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264257560 LK accesscardiology.mhmedical.com/content.aspx?aid=1202444104 RD 2024/10/12 AB Chapter SummaryThis chapter discusses important nonatherosclerotic etiologies of myocardial injury, which can be due to ischemic or nonischemic causes (see Fuster and Hurst's Central Illustration). Differentiating the etiology of myocardial injury is critical because the management strategy differs for atherosclerotic versus nonatherosclerotic causes. Type 1 myocardial infarctions (MIs) are due to atherosclerotic plaque rupture/erosion with thrombus formation and typically require invasive management for restoration of coronary perfusion. Type 2 MIs can result from ischemia due to imbalance of oxygen supply and demand, or nonatherosclerotic causes such as spontaneous coronary artery dissection, coronary vasospasm, coronary embolism, coronary vasculitis, coronary ectasia, and anatomic coronary artery anomaly. Causes of nonischemic myocardial injury include myocarditis, takotsubo syndrome, and heart failure. The management of type 2 MIs and nonischemic causes of myocardial injury depends on the underlying etiology, and thus discerning these “mimickers” of non-type 1 MI is pertinent for prompt and appropriate management of acute coronary syndromes.